@article{TM_1993_204_a14,
     author = {Kh. P. Rustamov},
     title = {On equivalence of different moduli of smoothness on the sphere},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {274--304},
     publisher = {mathdoc},
     volume = {204},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1993_204_a14/}
}